/**
 *
 *    geo-platform
 *    Rich webgis framework
 *    http://geo-platform.org
 *   ====================================================================
 *
 *   Copyright (C) 2008-2021 geoSDI Group (CNR IMAA - Potenza - ITALY).
 *
 *   This program is free software: you can redistribute it and/or modify it
 *   under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version. This program is distributed in the
 *   hope that it will be useful, but WITHOUT ANY WARRANTY; without
 *   even the implied warranty of MERCHANTABILITY or FITNESS FOR
 *   A PARTICULAR PURPOSE. See the GNU General Public License
 *   for more details. You should have received a copy of the GNU General
 *   Public License along with this program. If not, see http://www.gnu.org/licenses/
 *
 *   ====================================================================
 *
 *   Linking this library statically or dynamically with other modules is
 *   making a combined work based on this library. Thus, the terms and
 *   conditions of the GNU General Public License cover the whole combination.
 *
 *   As a special exception, the copyright holders of this library give you permission
 *   to link this library with independent modules to produce an executable, regardless
 *   of the license terms of these independent modules, and to copy and distribute
 *   the resulting executable under terms of your choice, provided that you also meet,
 *   for each linked independent module, the terms and conditions of the license of
 *   that module. An independent module is a module which is not derived from or
 *   based on this library. If you modify this library, you may extend this exception
 *   to your version of the library, but you are not obligated to do so. If you do not
 *   wish to do so, delete this exception statement from your version.
 */
package org.geosdi.geoplatform.services.rs.config.converter;

import javax.ws.rs.ext.ParamConverter;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.regex.Pattern;

import static java.util.stream.Collectors.toMap;

/**
 * @author Giuseppe La Scaleia - CNR IMAA geoSDI Group
 * @email giuseppe.lascaleia@geosdi.org
 */
public class GPWFSMapParamConverter implements ParamConverter<Map<String, String>> {

    /**
     * Parse the supplied value and create an instance of {@code T}.
     *
     * @param value the string value.
     * @return the newly created instance of {@code T}.
     * @throws IllegalArgumentException if the supplied string cannot be
     *                                  parsed or is {@code null}.
     */
    @Override
    public Map<String, String> fromString(String value) {
        value = value.replace("{", "").replace("}", "");
        return Pattern.compile(",").splitAsStream(value)
                .map(v -> v.split("="))
                .collect(toMap(parts -> parts[0], parts -> parts[1], (v1, v2) -> v1, LinkedHashMap::new));
    }

    /**
     * Convert the supplied value to a String.
     * <p>
     * This method is reserved for future use. Proprietary JAX-RS extensions may leverage the method.
     * Users should be aware that any such support for the method comes at the expense of producing
     * non-portable code.
     * </p>
     *
     * @param value the value of type {@code T}.
     * @return a String representation of the value.
     * @throws IllegalArgumentException if the supplied object cannot be
     *                                  serialized or is {@code null}.
     */
    @Override
    public String toString(Map<String, String> value) {
        return value.toString();
    }
}